Electric discharge lamp



FIG. 1 is a plan view of the electric discharge lamp, showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right-hand side view thereof;

FIG. 4 is a perspective view thereof; and

FIG. 5 is a rear view thereof on a reduced scale. 

The ornamental design for an electric discharge lamp, as shown and described. 